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How to generate all permutations of a list?
...re using an older Python (<2.6) for some reason or are just curious to know how it works, here's one nice approach, taken from http://code.activestate.com/recipes/252178/:
def all_perms(elements):
if len(elements) <=1:
yield elements
else:
for perm in all_perms(elemen...
How to disable back swipe gesture in UINavigationController on iOS 7
...
I found a solution:
Objective-C:
if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
self.navigationController.interactivePopGestureRecognizer.enabled = NO;
}
Swift 3+:
self.navigationController?.interactive...
How can strings be concatenated?
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What happens if you want a multi line string concatenation?
– pyCthon
Nov 28 '13 at 19:52
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CoffeeScript, When to use fat arrow (=>) over arrow (->) and vice versa
... Of course it will, but that would fall under "doing it wrong". I have now edited my answer and explain just when a => would be needed on the static/instance methods of a class.
– Alex Wayne
Jan 23 '12 at 0:25
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How to .gitignore files recursively
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If this answer does not work (on Windows), add the character / at the beginning. Example: /MyProject/WebApp/Scripts/special/**/*.js
– batressc
Oct 26 '16 at 3:50
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warning: incompatible implicit declaration of built-in function ‘xyz’
... In an implicit declaration, the return type is int if I recall correctly. Now, GCC has built-in definitions for some standard functions. If an implicit declaration does not match the built-in definition, you get this warning.
To fix the problem, you have to declare the functions before using them...
How to call another controller Action From a controller in Mvc
... Won't you be missing ControllerContext, Request and friends if you just do this?
– cirrus
Oct 15 '13 at 10:37
22
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The order of elements in Dictionary
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If you want the elements ordered, use an OrderedDictionary. An ordinary hastable/dictionary is ordered only in some sense of the storage layout.
shar...
Get MIME type from filename extension
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Hey pplz MSFT has now implemented it! Check this
– Shimmy Weitzhandler
Jan 1 '13 at 5:32
6
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If my interface must return Task what is the best way to have a no-operation implementation?
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Sorry, I had to mention the context :) As I see it now, we can make public Task WillBeLongRunningAsyncInTheMajorityOfImplementations() as well as public async Task WillBeLongRunningAsyncInTheMajorityOfImplementations(). So, we can either return CompletedTask; or await Complet...